<!DOCTYPE html>
<html>
	<head>
	 <style>
	  html, body {
	  height: 100%;
	  padding: 0;
	  margin: 0;
	  background: #000;
	}
	canvas {
	  position: absolute;
	  width: 100%;
	  height: 100%;
	}
	  </style>
	 </head>
	
	 <body>
	  <canvas id="pinkboard"></canvas>
	  <script>
	  /*
	 * Settings
	 */
	var settings = {
	  particles: {
	    length:   500, // maximum amount of particles
	    duration:   2, // particle duration in sec
	    velocity: 100, // particle velocity in pixels/sec
	    effect: -0.75, // play with this for a nice effect
	    size:      30, // particle size in pixels
	  },
	};
	
	/*
	 * RequestAnimationFrame polyfill by Erik Möller
	 */
	(function(){var b=0;var c=["ms","moz","webkit","o"];for(var a=0;a<c.length&&!window.requestAnimationFrame;++a){window.requestAnimationFrame=window[c[a]+"RequestAnimationFrame"];window.cancelAnimationFrame=window[c[a]+"CancelAnimationFrame"]||window[c[a]+"CancelRequestAnimationFrame"]}if(!window.requestAnimationFrame){window.requestAnimationFrame=function(h,e){var d=new Date().getTime();var f=Math.max(0,16-(d-b));var g=window.setTimeout(function(){h(d+f)},f);b=d+f;return g}}if(!window.cancelAnimationFrame){window.cancelAnimationFrame=function(d){clearTimeout(d)}}}());
	
	/*
	 * Point class
	 */
	var Point = (function() {
	  function Point(x, y) {
	    this.x = (typeof x !== 'undefined') ? x : 0;
	    this.y = (typeof y !== 'undefined') ? y : 0;
	  }
	  Point.prototype.clone = function() {
	    return new Point(this.x, this.y);
	  };
	  Point.prototype.length = function(length) {
	    if (typeof length == 'undefined')
	      return Math.sqrt(this.x * this.x + this.y * this.y);
	    this.normalize();
	    this.x *= length;
	    this.y *= length;
	    return this;
	  };
	  Point.prototype.normalize = function() {
	    var length = this.length();
	    this.x /= length;
	    this.y /= length;
	    return this;
	  };
	  return Point;
	})();
	
	/*
	 * Particle class
	 */
	var Particle = (function() {
	  function Particle() {
	    this.position = new Point();
	    this.velocity = new Point();
	    this.acceleration = new Point();
	    this.age = 0;
	  }
	  Particle.prototype.initialize = function(x, y, dx, dy) {
	    this.position.x = x;
	    this.position.y = y;
	    this.velocity.x = dx;
	    this.velocity.y = dy;
	    this.acceleration.x = dx * settings.particles.effect;
	    this.acceleration.y = dy * settings.particles.effect;
	    this.age = 0;
	  };
	  Particle.prototype.update = function(deltaTime) {
	    this.position.x += this.velocity.x * deltaTime;
	    this.position.y += this.velocity.y * deltaTime;
	    this.velocity.x += this.acceleration.x * deltaTime;
	    this.velocity.y += this.acceleration.y * deltaTime;
	    this.age += deltaTime;
	  };
	  Particle.prototype.draw = function(context, image) {
	    function ease(t) {
	      return (--t) * t * t + 1;
	    }
	    var size = image.width * ease(this.age / settings.particles.duration);
	    context.globalAlpha = 1 - this.age / settings.particles.duration;
	    context.drawImage(image, this.position.x - size / 2, this.position.y - size / 2, size, size);
	  };
	  return Particle;
	})();
	
	/*
	 * ParticlePool class
	 */
	var ParticlePool = (function() {
	  var particles,
	      firstActive = 0,
	      firstFree   = 0,
	      duration    = settings.particles.duration;
	  
	  function ParticlePool(length) {
	    // create and populate particle pool
	    particles = new Array(length);
	    for (var i = 0; i < particles.length; i++)
	      particles[i] = new Particle();
	  }
	  ParticlePool.prototype.add = function(x, y, dx, dy) {
	    particles[firstFree].initialize(x, y, dx, dy);
	    
	    // handle circular queue
	    firstFree++;
	    if (firstFree   == particles.length) firstFree   = 0;
	    if (firstActive == firstFree       ) firstActive++;
	    if (firstActive == particles.length) firstActive = 0;
	  };
	  ParticlePool.prototype.update = function(deltaTime) {
	    var i;
	    
	    // update active particles
	    if (firstActive < firstFree) {
	      for (i = firstActive; i < firstFree; i++)
	        particles[i].update(deltaTime);
	    }
	    if (firstFree < firstActive) {
	      for (i = firstActive; i < particles.length; i++)
	        particles[i].update(deltaTime);
	      for (i = 0; i < firstFree; i++)
	        particles[i].update(deltaTime);
	    }
	    
	    // remove inactive particles
	    while (particles[firstActive].age >= duration && firstActive != firstFree) {
	      firstActive++;
	      if (firstActive == particles.length) firstActive = 0;
	    }
	    
	    
	  };
	  ParticlePool.prototype.draw = function(context, image) {
	    // draw active particles
	    if (firstActive < firstFree) {
	      for (i = firstActive; i < firstFree; i++)
	        particles[i].draw(context, image);
	    }
	    if (firstFree < firstActive) {
	      for (i = firstActive; i < particles.length; i++)
	        particles[i].draw(context, image);
	      for (i = 0; i < firstFree; i++)
	        particles[i].draw(context, image);
	    }
	  };
	  return ParticlePool;
	})();
	
	/*
	 * Putting it all together
	 */
	(function(canvas) {
	  var context = canvas.getContext('2d'),
	      particles = new ParticlePool(settings.particles.length),
	      particleRate = settings.particles.length / settings.particles.duration, // particles/sec
	      time;
	  
	  // get point on heart with -PI <= t <= PI
	  function pointOnHeart(t) {
	    return new Point(
	      160 * Math.pow(Math.sin(t), 3),
	      130 * Math.cos(t) - 50 * Math.cos(2 * t) - 20 * Math.cos(3 * t) - 10 * Math.cos(4 * t) + 25
	    );
	  }
	  
	  // creating the particle image using a dummy canvas
	  var image = (function() {
	    var canvas  = document.createElement('canvas'),
	        context = canvas.getContext('2d');
	    canvas.width  = settings.particles.size;
	    canvas.height = settings.particles.size;
	    // helper function to create the path
	    function to(t) {
	      var point = pointOnHeart(t);
	      point.x = settings.particles.size / 2 + point.x * settings.particles.size / 350;
	      point.y = settings.particles.size / 2 - point.y * settings.particles.size / 350;
	      return point;
	    }
	    // create the path
	    context.beginPath();
	    var t = -Math.PI;
	    var point = to(t);
	    context.moveTo(point.x, point.y);
	    while (t < Math.PI) {
	      t += 0.01; // baby steps!
	      point = to(t);
	      context.lineTo(point.x, point.y);
	    }
	    context.closePath();
	    // create the fill
	    context.fillStyle = '#ea80b0';
	    context.fill();
	    // create the image
	    var image = new Image();
	    image.src = canvas.toDataURL();
	    return image;
	  })();
	  
	  // render that thing!
	  function render() {
	    // next animation frame
	    requestAnimationFrame(render);
	    
	    // update time
	    var newTime   = new Date().getTime() / 1000,
	        deltaTime = newTime - (time || newTime);
	    time = newTime;
	    
	    // clear canvas
	    context.clearRect(0, 0, canvas.width, canvas.height);
	    
	    // create new particles
	    var amount = particleRate * deltaTime;
	    for (var i = 0; i < amount; i++) {
	      var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random());
	      var dir = pos.clone().length(settings.particles.velocity);
	      particles.add(canvas.width / 2 + pos.x, canvas.height / 2 - pos.y, dir.x, -dir.y);
	    }
	    
	    // update and draw particles
	    particles.update(deltaTime);
	    particles.draw(context, image);
	  }
	  
	  // handle (re-)sizing of the canvas
	  function onResize() {
	    canvas.width  = canvas.clientWidth;
	    canvas.height = canvas.clientHeight;
	  }
	  window.onresize = onResize;
	  
	  // delay rendering bootstrap
	  setTimeout(function() {
	    onResize();
	    render();
	  }, 10);
	})(document.getElementById('pinkboard'));
	  </script>
	 </body>
</html>